Cheap Flights from St Louis to Boise

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      Travellers and cabin class, 1 Adult, Economy

      Compare St Louis to Boise flight deals

      Find the cheapest month or even day of the year to fly to Boise

      Book the best Boise fare with no extra fees

      Flight deals from St Louis to Boise

      Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Boise Airport? If you want to travel next month, return fares start from Rs77,836. Find the lowest prices on one-way and return tickets right here.

      Find the cheapest month to fly from St Louis to Boise

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like St Louis to Boise flights are currently cheapest in August.

      St Louis to Boise: Alternative routes

      Compare routes from St Louis to Boise below. You may find an airport to fly into that's cheaper, faster, or easier than Boise.

      St Louis to Boise: Flight information

      The things to know before you go.
      Cheapest flight foundRs36,467
      Cheapest month to flyAugust

      Finding cheap flights from St Louis to Boise: Frequently asked questions

      The best price we found for a return flight from St Louis to Boise is Rs72,763. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      Currently, there are no airlines that fly direct from St Louis to Boise. But we found flights with one or more stops from Rs72,763.
      As of July 2026, there are no flights flying from St Louis to Boise.
      The cheapest month to fly from St Louis to Boise is usually September.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Boise Airport on Tuesday, 1 September 2026.
      No airlines currently offer direct flights between St Louis Airport and Boise Airport. Most routes have one or more stops.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Boise but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Boise is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Delta offers the cheapest flight tickets to Boise.

      Travelling from St Louis Airport (STL) to Boise Airport (BOI): what you need to know

      • Give yourself enough time to make your STL to BOI flight. A good rule of thumb is to arrive two hours before international departures and an hour ahead for domestic flights.

      • You can expect bigger queues during popular months such as July. Arriving up to four hours in advance for international flights and two hours for a domestic departure will help ensure a smooth travel experience.

      • We make it a breeze to book a flight with a stopover. To see all your options for tickets from St Louis Airport to Boise Airport, deselect 'Direct flights only.' Then, choose a flight that has a stop long enough to visit the city of your choice. Popular stopovers between STL and BOI include:

        • Denver International Airport

        • Minneapolis St Paul Airport

        • Salt Lake City Airport

      How to find the cheapest flights from St Louis Airport (STL) to Boise Airport (BOI)

      • The lowest price we've found for a one-way St Louis Airport to Boise Airport flight is Rs36,504. A return plane ticket is currently Rs72,763. Depending on the availability and when you book, these fares can change.

      • It's a good idea to book in advance if you want to find cheap tickets from STL to BOI. That's because flight prices are based on demand, which tends to increase closer to departure.

      • The 'Whole month' search function shows you the cheapest flights from St Louis Airport to Boise Airport across every month. It's a good way to find a bargain if your travel dates are flexible.

      • Save time searching for cheap flights from STL to BOI by setting up a Price Alert. You'll receive an email or notification on the app when a lower fare pops up.

      • Lock in the right flight for you by using the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from St Louis Airport to Boise Airport, use the 'Sort by' tool. You can also filter by departure and arrival times, airline, and journey duration.

      Handy information about St Louis Airport (STL)

      Arriving at Boise Airport (BOI)

      Getting from Boise Airport (BOI) to central Boise

      • The street address for BOI is 3201 Airport Way.

      • Boise Airport is approximately 6 kilometres from the centre of Boise. The drive time takes around 15 minutes.

      • It takes roughly 30 minutes if you're travelling on public transport.

      When to fly to Boise Airport (BOI)

      • The quietest month for a flight from St Louis Airport to Boise Airport is March, while October is the busiest. Pick the best time to visit Boise based on whether you prefer a laid-back vibe or a more bustling atmosphere.

      • Book your flight from St Louis Airport to Boise Airport for July if you'd like to go to Boise during its warmest month. Expect temperatures of between 15ºC and 35ºC.

      • Look for cheap tickets from STL to BOI in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between -11ºC and 5ºC on average.

      Explore more of the United States

      • You've visited Boise, now it's time to explore more of the United States. Travel around 467 kilometres north to Spokane to tick off its top sights. From Riverside State Park to Spokane Falls (Upper Falls) and Cathedral of Our Lady of Lourdes, you've got a jam-packed schedule ahead.

      • Salt Lake City is another well-known destination in the United States and is around 483 kilometres south-east of Boise. No trip is complete without visiting Salt Lake Utah Temple, Temple Square and Salt Lake City Tabernacle.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.